Picnic Grounds Section 4.5 meters above base (Ordovician of the United States)

Where: Brewster County, Texas (30.2° N, 103.3° W: paleocoordinates 20.2° S, 79.5° W)

When: Dicellograptus gravis graptolite zone, Maravillas Formation, Eastonian (456.1 - 449.5 Ma)

• Overlies Woods Hollow Shale. Authors describe stratigraphy in terms of Australian scale. Amorphognafhus ordovicicus conodont zone.

• bed-level stratigraphic resolution

Environment/lithology: marine; shale

• Not described, but shown as "~" in block.

Size class: macrofossils

Preservation: cast

Primary reference: D. M. Goldman, S. M. Bergström, and C. E. Mitchell. 1995. Revision of the Zone 13 graptolite biostratigraphy in the Marathon, Texas, standard succession and its bearing on Upper Ordovician graptolite biogeography. Lethaia 28:115-128 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 184416: authorized by Pete Wagner, entered by Pete Wagner on 24.02.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Graptolithina
 Diplograptoidea - Diplograptidae
Orthograptus quadrimucronatus Hall 1865 diplograptoid
 Bireclinata -
"Climacograptus tubuliferus" = Styracograptus tubuliferus, Climacograptus nevadensis
"Climacograptus tubuliferus" = Styracograptus tubuliferus Lapworth 1876 climacograptid
Climacograptus nevadensis Carter 1972 climacograptid